Ripmax WOT4-E Quick start guide

Introduction

Congratulations on your purchase of the WOT 4-E ARTF-the first electric almost ready to fly

version of this timeless classic. Described as the most exciting sports aerobatic model of all time,

it can be assembled in the minimum of time.

Before commencing construction, please ensure that you read these instrutions in their entirety.

Items recommended to Complete

The Wot 4-e ARTF is suitable for a wide variety of power systems. We have found the following

combination to be the perfect balance of power,low weight and economy.

Motor: KMS Quantum 2820/05 Part No.M-KMSQ2820/05

ESC: Arrowind 35A ESC(SW) Part No.P-AWDFC3505SW or Dragon X 45A Brushless ESC

Part No. P-RMXD045

Propeller: APC 11”*5.5” Thin Electric Part No.E-LP11055E

Li-Po: 3 cell 2100-2500mah 20C

Fitting the ailerons and Completing wing

STEP 1

The wings and ailerons are aupplied with the hinges loose fitted,ready for installation. Remove

both ailerons and ensure that the hinges are inserted mid-way in their slots. Using thin cyano, pour

a couple of drops onto each hinge-above and below-ensuring the glue soaks into the hinge and the

surrounding wood.

STEP 2

Carefully slide each aileron into position,ensuring a gap-free hinge line. Make sure that each

aileron lines up with the wing tips and tat they are free to move through their entire travel. Centre

each aileron between the root and tip so that there is a equal gap at both ends. Minimise any hinge

gap, then carefully add a couple of drops of thin cyano to the top and bottom of each hinge

ensuring that the glue does not run through the hinge line onto the bottom of the wing. Turn the

wing over and drop more cyano onto each hinge from the other side.

STEP 3

Locate the wing servo apertures through the covering on the underside of the wing.carefully trim

away the covering as shown.

STEP 4

Prepare your aileron servos by connecting a suitable 300mm extension lead to each. It is a good

idea to use a lead-lock, a turn of insulation tape or heatshrink tube over the joint for additional

security.carefully tie each aileron servo’s lead to the length of cotton already in the wing panels.

STEP 5

Cut away the covering over the servo lead holes in the underside of the wing panels and carefully

pull the leads through to the center of the wing using the cotton thread.lift out the servo connector

through the hole then retain the servo lead with a short length of tape to stop the lead pulling back

into the wing.

STEP 6

Check that your choice of servo fits the servo apertures in the underside of the wing. Adjust the

size of the mounting holes with a sharp knife if required. Pilot drill the mounting holes.

STEP 7

Screw the aileron servos in position using the mounting screws, rubber grommets and ferrules

supplied with your radio. Note that the output arms face towards the rear of the wing.

STEP 8

Locate the aileron control horns. They are screwed in position on the ailerons in line with the

aileron servo’s output arm. Align the row of holes in the horn with the hinge line. Mark and pilot

drill two mounting holes in each aileron.

STEP 9

Screw the aileron horns in position. The screws thread into the moulded horn plate on the top

surface of the wing. Do not overtighten the control horn mounting screws-you don;t wat to crush

the aileron.

STEP 10

Use a small length of tape to hold each of the ailerons at their neutral position while you complete

the aileron linkages. Ensure that both aileron servos are centered.

STEP 11

The aileron push-rods is adjustable ball links system.

STEP 12

Enlarge the servo arm holes to 2mm for install the M2 screws.

STEP 13

Install the ball links to the servo arms with M2 screws and locking nuts.

STEP 14

Install the ball links to the aileron horns with M2 screws and locking nuts.

STEP 15

You can adjust the pushrod by rotate the ball links.

STEP 16

Epoxy the incidence locating dowel in position in one wing panel.

STEP 17

Using a sharp knife, prepare the wings for joining by trimming off any excess film that has

overlapped the root during manufacture.

STEP 18

Locate the wing joining brace, measure and mark a center-line on the joining brace.

STEP 19

Coat one half of the brace and the inside of the corresponding slot in the wing panel with rapid

setting epoxy. Ensure that adequate epoxy is used to fully cover all surfaces.

STEP 20

Insert the brace half-way into one wing panel using the center-line as a guide.wipe off any excess

epoxy and allow glue to cure.

STEP 21

Now spread sufficient epoxy over the opposite panel joiner slot,wing joiner and root rib.we

suggest using 30 minute or 1 hour epoxy for this.

STEP 22

Protect the covering with masking tape,then bring the two panels together ensuring the epoxy fills

the join. Wipe off any excess that squeezes out of the joint,then use tape to hold the panels

together as the adhesive cures.

Fuselage,Motor&Radio

STEP 23

Locate the aluminium main undercarriage,wheels and wheel mounting hardware(mounting

screws,plain and nylon nuts). Pass the mounting screw through the wheel,screw on a plain

nut,then pass through the main undercarriage. Now fit a nylon nut on the inside. Hold the inner nut

still and tighten the nylon nut.check the wheel rotates freely.repeat for the second wheel.

STEP 24

Locate the position of the captive nuts already installed for the undercarriage in the underside of

the fuselage.carefully trim away the covering with a sharp knife. Install the main undercarriage

using the two mounting screws supplied.

STEP 25

Locate the pre-bent tailwheel assembly and fit the tailwheel using the collet supplied.

STEP 26

Prepare the fuselage for fitting the tailplane by carefully trimming the covering away from the

pre-cut tailplane slot. Also cut away the covering over the exit slots for the rudder and elevator

pushrods/closed loops.

STEP 27

Prepare the fuselage for fitting the fin by carefully trimming the covering away from the pre-cut

fin slot.

STEP 28

Holding the tailwheel assembly in position with the tail wheel wire inline with the rear of the

fuselage,pilot drill the fuselage.

STEP 29

Screw the tailwheel assembly in position with the three self-tapping screws supplied.

STEP 30

Install your elevator and rudder servos in the pre-fitted servo tray. Note the orientation of the servo

out puts.pilot drill the tray for your servo mounting.

STEP 31

Fit the brass ferrules and rubber grommets supplied with your servos,then screw them in position

as shown.

STEP 32

Measure and mark a center-line on the top of the tailplane.

STEP 33

Slide the tailplane into its pre-cut slot in the rear of the fuselage.ensure that it is square to the

fuselage and centered in its slot using a long ruler or string as shown in the diagram on the right.

Mark the tailplane on the top and bottom where it enters the fuselage using a soft,water-soluble

pen.

STEP 34

Remove the tailplane and cut away the covering from just inside the marked lines to give a

film-free surface for the glue to bond.IMPORTANT:Ensure that only the film is cut-not the

tailplane-as this will seriously weaken the structure.

STEP 35

Using sufficient epoxy applied to the exposed wood,glue the tailplane into its slot.

STEP 36

Check that the tailplane is correctly aligned and square to the fuselage. Use masking tape to

protect the covering(removing it as soon as you are satisfied with the alignment and before the

epoxy cures). Excess epoxy should be wiped from the model before it cures using methylated

spirit or methanol.

STEP 37

Once the epoxy has cured,slide the fin into its pre-cut slot in the top of the fuselage. Ensure that it

is pushed down far enough to touch the top of the tailplane. Mark the fin on both sides where it

enters the fuselage using a soft, water-soluble pen.

STEP 38

Remove the fin and cut away the covering from just below the marked line to give a film-free

surface for the glue to bond. IMPORTANT NOTE: Ensure that only the film is cut-not the fin-as

this will seriously weaken the structure.

STEP 39

Remove the film immediately in front of the fin slot so that the front of the fin has bare wood to

bond to.

STEP 40

Using epoxy,glue the fin in its slot. Use masking tape to protect the covering whilst you do

this(removing it as soon as you are satisfied with the alignment and before the epoxy cures).

Check that the fin is pushed down fully into its slot in the top of the fuselage and ensure that it is

perpendicular to the tailplane using a set square.

STEP 41

Remove the elevator slot film with searing iron. Insert two hinges in each elevator half,ensuring

they are located mid-way in their slots. Using thin cyano, pour a couple of drops onto each

hinge-above and below-ensuring the glue soaks into the hinge and the surrounding wood.

STEP 42

Now slide the first elevator into position ensuring their hinges enter their pre-cut slots in the

tailplane. Ensuring a gap-free hinge line and a 1mm gap between the elevator and tip,add a couple

of drops of thin cyano to the top and bottom of each hinge. Make sure that the glue does not run

through the hinge line onto the bottom of the tail. Add a drop of CA glue to stick the U wire to the

elevator hole.

STEP 43

Repeat the procedure for the second elevator half,ensuring a gap-free hinge line.

STEP 44

Remove the rudder slot film with searing iron. Insert two hinges into the rudder,ensuring they are

located mid-way in their slots. Using thin cyano,pour a couple of drops onto each hinge-above and

below-ensuring the glue soaks into the hinge and surrounding wood. Install the rudder to the fin to

check the tail wheel wire bend position.

STEP 45

Bend the tail wheel wire with vice and stick the wire to the rudder hole.

STEP 46

Now slide the rudder in place making sure that both hinges are located in their slots in the fin and

that the tailwheel wire fits neatly into tis recess in the rudder. Wipe off any excess epoxy. Ensure

that the rudder is aligned to the top of the fin and there is free movement left and right plus a

gap-free hinge line. Now apply a couple of drops of thin cyano to each side of each hinge taking

care not to allow the adhesive to run through the gap onto the other side of the model. Then install

the tapping screws to the tail-board again.

STEP 47

Install the two nylon horns to the rudder with 2 screws.

STEP 48

Ensuring they are aligned to the hinge line, position the elevator horns on the underside of the

elevator. Mark and pilot drill two mounting holes in elevator half.Now screw the control horns to

each elevator half. The screws thread into the moulded horn plate on the top surface of the

elevators. Do not overtighten the control horn mounting screws-you don’t want to crush the

elevators. Trim away excess threads.

Ripmax WOT4-E Quick start guide

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